James K Polk, number 11.
1) Laid out 4 things he wanted to accomplish in a single 4 year term.
2) Vowed to complete those 4 things and not run for re-election.
3) Did it.
4) The four things:
a) Settle the northwest boundary to secure Washington and Oregon, without going to war with the UK. DONE.
b) Take all of the American Southwest from Mexico, via war if necessary (Texas to California.) DONE.
c) Reduce tariffs. DONE.
d) Reestablish the Independent Treasury System. DONE.